gsw (version 1.0-5)

gsw_Fdelta: Ratio of Absolute to Preformed Salinity, minus 1

Description

Ratio of Absolute to Preformed Salinity, minus 1

Usage

gsw_Fdelta(p, longitude, latitude)

Arguments

p

sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

longitude

longitude in decimal degrees, positive to the east of Greenwich. (This is called long in the TEOS-10 Matlab code.)

latitude

latitude in decimal degrees, positive to the north of the equator. (This is called lat in the TEOS-10 Matlab code.)

Value

(S/SStar)-1 [ unitless ]

Details

The present R function works with a wrapper to a C function contained within the GSW-C system (Version 3.05-4 dated 2017-08-07, available at https://github.com/TEOS-10/GSW-C, as git commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec'), which stems from the GSW-Fortran system (https://github.com/TEOS-10/GSW-Fortran) which in turn stems from the GSW-Matlab system (https://github.com/TEOS-10/GSW-Matlab). Consult http://www.teos-10.org to learn more about these software systems, their authorships, and the science behind it all.

References

http://www.teos-10.org/pubs/gsw/html/gsw_Fdelta.html

Examples

# NOT RUN {
p <- c(         10,   50,  125,  250,  600, 1000)
latitude <- c(   4,    4,    4,    4,    4,    4)
longitude <- c(188,  188,  188,  188,  188,  188)
r <- gsw_Fdelta(p, longitude, latitude)
expect_equal(r/1e-3, c(0.006472309923452, 0.010352848168433, 0.025541937543450,
                     0.104348729347986, 0.218678084205081, 0.365415366571266))
# }